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Manuscript Title: EBEGA: the counting efficiency of a beta-gamma emitter in liquid scintillators.
Authors: E. Garcia-Torano, A. Grau Malonda, J.M. Los Arcos
Program title: EBEGA
Catalogue identifier: ABDK_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 50(1988)313
Programming language: Fortran.
Computer: IBM 3090/150.
Operating system: VM.
RAM: 143K words
Word size: 32
Keywords: Particle physics, Elementary, Detector design, Beta-decay, Liquid scintillation, Efficiency.
Classification: 11.7.

Nature of problem:
This program computes the counting efficiency of a beta-gamma ray emitter as a function of the figure of merit in liquid scintillators.

Solution method:
The beta spectra are calculated from the Fermi theory of beta decayy, taking into account shape factors. The gamma-ray interaction with the scintillator is simulated by means of a Monte Carlo procedure, in order to obtain the gamma ray interaction probability and the spectrum of Compton and photoelectric electrons. The partial counting efficiency for beta gamma-ray coincidence, beta internal conversion coincidence and single beta-ray are computed to obtain the total counting efficiency.

The counting efficiency is valid for spectrometers with two photo- multipliers working in coincidence. Pair production is not considered in the Monte Carlo code; hence, results for gamma-rays with energy superior to 2 MeV must be carefully considered. The cross sections for gamma-ray interaction correspond to a toluene based scintillator. For other scintillators, the corresponding cross section has to be modified.

Running time:
The test requires 147 s of cpu time for the IBM 3090/150 computer, including compilation and linking.